Pressure-gage



M. C. SCHWEINERT.

PRESSURE GAGE. APPLICATION FILED AUG.26, l gll- RENEWED DEC. 5. 1919.

1,352,698. v .PatentedSepfu. 14,1920.

INVENTOR MAJEIIIIILIAN CHAR-LES SCHWEI'NERT, OF WEST I-IOEOKEII, NEWJERSEY.

To all whom it may concern:

'Be it known that I,.MAx1M1L1AN-CHARLE$ SoHWEINERT, a citizen of theUnited States, residing in est Hobokeru'in the county of Hudson andState of New Jersey, have invented certain new and useful Improve mentsin PressureGages, of which the following is specification. v

This invention relates to pressure gages and aims to provide certainimprovements therein. The chief object of the present in vention is toprovide a simple and compact gage which is adapted to be directly connected with a cylinder of a gas or other engine to indicate thepressures therein. The gage is however, adapted for use in connectionwith pressure tanks used for storing air for inflating tires, or otherreceptacles which contain liquid, the pressure of which it is desired toobserve.

A further object of the invention. is to provide a gage of this classwhich can also be utilized. to determine the pressure in pneumatic tiresor other devices having a valve which it is necessary to unseat in orderto permit air to flow to the gage. It has been heretofore proposed by meto pro vide a ga e which is adapted primarily for use in pneumatic tiresand which has connected therewith a coupling member by means of-Which itmay be also utilized in connection with cylinders, tanks, etc.

In the preferred form of the invention the gage comprises an outercasing which itself is provided with a means for connecting it to acylinder or tank, such as a screwthreaded portion adapted to engage apor tion on the cylinder or tank. The casing is also preferably formedwith wrench faces or similar devices which are used in applymg the gageto the device with which it is to be connected. This casing 1S ofsufficient length to contain or partly contain the in ternal mechanismof the gage, and preferably also constitutes one of the indicating iieinbers of the gage. By the present invention in its preferred form Iprovide a gage in which the necessity of a coupling member is obviatedand which nevertheless is adapted equally for use for either of thepurposes just mentioned. Preferably also the gage is provided at itslower end with a portion adapted to contact with and make a leak-tightjoint with a tire valve or. the like, and with means for unseating thevalve proper or such e valve. The invention Specification of Letters latent.

also includes certain other features of construction which will behereinafter more fully pointed out.

Referring to the drawings,

Figure l is anelevation of one form of my invention.

Fig. 2 is a diainetrical section. of Fig. 1.. Fig.- 3 is a top or planview. i In the drawing l. have shown my inven tion as applied to'a gageof the type set forth and claimed in application No. 552,111 and No.712,72-l, filed by me and Henry P. Kraft jointly.

Referring to the embodiment of the in vention illustrated. in thedrawings, let A indicate the whole having a casing B. This casing ispreferably formed of a length of metal rod of appropriate diameter andis constructed with a longitudinal bore C adapted to receive theinternal mechanism of the (inc object of the present in.- vention is toprovide a casing 13. which is adapted to be directly connected with anengine cylinder or other wall, or stated otherwise, to provide a gage inwhich the casing performs not only the function of inclosing thenecessary mechanism, but also that of the coupling by which it may beconnected to such wall. To this end the casing is formed preferably atits lower part with a means for engaging a wall or the like. These meanspreferably are screwthreads such as D, which are designed to engagecomplementary threads E formed on the part to which it is to beconnected I Patented Sept. Ml, Zlhfifd.

App1ication filed. August 26, 1911, Serial No. sealer. Renewed December5, 3919.

Eerial l lo. 842,803.

which is represented as a Wall F. It is preferable also that the casing;should have tool. faces by which it may be forced into a tight relationwith the wall F. These tool faces are preferably wrench faces G, bestseen ll] Fig. 3, and may be advantageously formed as the outer faces ofa flange H, the lower side of which is adapted to compress a washer 1against the surface of the wall l Preferably also an inclined shoulder Jis forined on' the exterior of the casing just above the screw-threads lwhich is adapted to make a tight joint on a correspondingly shaped.shoulder usually present in an engine cylinder or the like.

' The gage mechanism may he of any de-- sirable type, but I prefer thatillustrated and having means thereon adapted to en- I gage in a socket,and means for making a said indicator part may partake of the mov /irecessed part of a container or to a pro ecting part of a container,said gage comprising a casing having means thereon adapted to engage ina socket, and means for making recessed. part of a container or to aprojecting part of'a container, said gage comprising a casing made of asingle. piece of metal tight contact connection with a projecting part,said socket-engaging means, when applied "to acontainer, inclosing saidmeans for making tight connection with a projecting'part.

6. A'g-age adapted for connection to a recessed part of a container orto a projecting part of a container, said gage comprising a casingmadeof a single piece of metal and having means thereon adapted toengage in a socket, and means for making a tight contact connection witha projecting part, said socket-engaging. means, when appl ed to acontainer inclosing said means formaking tight connection with aprojecting part, said casing having a thickened portion shaped forengagement by a turning tool.

7. A gage adapted for connectionto a recessed part of a container or toavprojecting part of a container, said gage comprising a casing havingat one end thereof means adapted to engage in a socket and means formaking a tight contact connection with a projecting part, and a plateadapted to close said end, said plate having a restricted orificetherethrough and having a projecting part adapted to depress a valvestem when the gage is applied to a projecting part of a container, saidrestricted orifice being'adapted to restrict an initial rush of fluidunder pressure into said gageand connection is formed.

to temper" the vchange in' pressure in the gage under fluctuations ofpressure; 8. A gage adapted for connection toe recessed part of aCOHtalIIBPOIZItO a project ing part of a container, said gage comprising,a' casing, a pressure responsive element'55 and an indicatorpart, saidcasing having" means therein adapted to engage in a socket and means formaking a tight contact conneotion with a projecting part, such engag=ing means being capable of being directly applied, said indicator partbeing independently movable and adaptedto main- -tain an actuatedposition when disconnected from saidpressure responsive element, andmeans for connecting sald indicator part and pressure responsive elementwhereby the other being an external screw-threaded connection adapted toenter. a screwthreaded spark'plug hole or the like ,o f anenginefcylinder. I

10. A pressure gage having a fluid-passage-way, two operativeconnections for connecting said fluid passi-ige-way with a" source ofpressure, saidconnections being of different character,,-one bei'n'gadapted" to make a tight joint with a"pneuiiiat ic tire valve, and theother being an external screw-threaded connection adapted to enter ascrew-threaded spark'plug hole of an engine cylinder or the like, andsaid gage g having a casing-on which said last-named 1i '90 In witnesswhereof, I have 'her'eu'z'rto signed my name in the presence of two sub;scribing witnesses.

THOS. F. WALLnCE, RENE BRUINE.

